How severe is CVE-2019-3787?

CVE-2019-3787 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-3787 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3787?

CVE-2019-3787 affects Pivotal Software Cloud Foundry Uaa-release. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3787?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-3787 published?

CVE-2019-3787 was published on 2019-06-19 and last updated on 2026-06-17.

CVE-2019-3787

CVE-2019-3787 is a high-severity vulnerability in Pivotal Software Cloud Foundry Uaa-release with a CVSS 3.x base score of 8.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-640.

Key facts

Severity: High (CVSS 3.x base score 8.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-640
Affected product: Pivotal Software Cloud Foundry Uaa-release
Published: 2019-06-19
Last modified: 2026-06-17

Description

Cloud Foundry UAA, versions prior to 73.0.0, falls back to appending “unknown.org” to a user's email address when one is not provided and the user name does not contain an @ character. This domain is held by a private company, which leads to attack vectors including password recovery emails sent to a potentially fraudulent address. This would allow the attacker to gain complete control of the user's account.

Frequently asked questions

What is CVE-2019-3787?: Cloud Foundry UAA, versions prior to 73.0.0, falls back to appending “unknown.org” to a user's email address when one is not provided and the user name does not contain an @ character. This domain is held by a private company, which leads to attack vectors including password recovery emails sent to a potentially fraudulent address. This would allow the attacker to gain complete control of the user's account.
How severe is CVE-2019-3787?: CVE-2019-3787 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-3787 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3787?: CVE-2019-3787 affects Pivotal Software Cloud Foundry Uaa-release. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3787?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-3787 published?: CVE-2019-3787 was published on 2019-06-19 and last updated on 2026-06-17.

References

https://www.cloudfoundry.org/blog/cve-2019-3787

Affected products (1)

cpe:2.3:a:pivotal_software:cloud_foundry_uaa-release:*:*:*:*:*:*:*:*

More vulnerabilities in Pivotal Software Cloud Foundry Uaa-release

CVE-2018-1192 — High (CVSS 8.8): In Cloud Foundry Foundation cf-release versions prior to v285; cf-deployment versions prior to v1.7; UAA 4.5.x versions…
CVE-2017-4963 — High (CVSS 8.1): An issue was discovered in Cloud Foundry Foundation Cloud Foundry release v252 and earlier versions, UAA stand-alone…
CVE-2018-1262 — High (CVSS 7.2): Cloud Foundry Foundation UAA, versions 4.12.X and 4.13.X, introduced a feature which could allow privilege escalation…
CVE-2018-11041 — Medium (CVSS 6.1): Cloud Foundry UAA, versions later than 4.6.0 and prior to 4.19.0 except 4.10.1 and 4.7.5 and uaa-release versions later…
CVE-2016-5016 — Medium (CVSS 5.9): Pivotal Cloud Foundry 239 and earlier, UAA (aka User Account and Authentication Server) 3.4.1 and earlier, UAA release…
CVE-2019-11268 — Medium (CVSS 4.3): Cloud Foundry UAA version prior to 73.3.0, contain endpoints that contains improper escaping. An authenticated…

All CVEs affecting Pivotal Software Cloud Foundry Uaa-release →

Other CWE-640 vulnerabilities

CVE-2025-63314 — Critical (CVSS 10.0): A static password reset token in the password reset function of DDSN Interactive Acora CMS v10.7.1 allows attackers to…
CVE-2023-7028 — Critical (CVSS 10.0): An issue has been discovered in GitLab CE/EE affecting all versions from 16.1 prior to 16.1.6, 16.2 prior to 16.2.9,…
CVE-2026-13019 — Critical (CVSS 9.8): Esri Portal for ArcGIS versions 12.1 and earlier on Windows, Linux and Kubernetes have a missing authentication for…
CVE-2026-37106 — Critical (CVSS 9.8): An issue in DokuWiki 2025-05-14b "Librarian" 56.2 allows a remote attacker to create an account via the register…
CVE-2026-12417 — Critical (CVSS 9.8): The SignUp & SignIn plugin for WordPress is vulnerable to Authentication Bypass via Weak Password Reset Validation…
CVE-2026-12416 — Critical (CVSS 9.8): The Invoice Generator plugin for WordPress is vulnerable to Account Takeover via Password Reset in all versions up to,…

Browse all CWE-640 vulnerabilities →